Department of Microbiology and Immunology, Columbia University College of Physicians and Surgeons, New York, New York, USADivision of Infectious Diseases, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, USA

Genomics Institute of the Novartis Research Foundation, San Diego, California, USADivision of Pharmacology and Drug Discovery, University of California, San Diego, School of Medicine, La Jolla, California, USA